namespace Community.CsharpSqlite
{
    public partial class Sqlite3
    {
        /*
    ** 2008 August 05
    **
    ** The author disclaims copyright to this source code.  In place of
    ** a legal notice, here is a blessing:
    **
    **    May you do good and not evil.
    **    May you find forgiveness for yourself and forgive others.
    **    May you share freely, never taking more than you give.
    **
    *************************************************************************
    ** This header file defines the interface that the sqlite page cache
    ** subsystem.
    *************************************************************************
    **  Included in SQLite3 port to C#-SQLite;  2008 Noah B Hart
    **  C#-SQLite is an independent reimplementation of the SQLite software library
    **
    **  SQLITE_SOURCE_ID: 2009-12-07 16:39:13 1ed88e9d01e9eda5cbc622e7614277f29bcc551c
    **
    **  $Header: Community.CsharpSqlite/src/pcache_h.cs,v bcbd36f24b23 2010/02/18 17:35:24 Noah $
    *************************************************************************
    */

#if !_PCACHE_H_

        //typedef struct PgHdr PgHdr;
        //typedef struct PCache PCache;


        /* Bit values for PgHdr.flags */
        //#define PGHDR_DIRTY             0x002  /* Page has changed */
        //#define PGHDR_NEED_SYNC         0x004  /* Fsync the rollback journal before
        //                                       ** writing this page to the database */
        //#define PGHDR_NEED_READ         0x008  /* Content is unread */
        //#define PGHDR_REUSE_UNLIKELY    0x010  /* A hint that reuse is Utility.Unlikely */
        //#define PGHDR_DONT_WRITE        0x020  /* Do not write content to disk */

        private const int PGHDR_DIRTY = 0x002; /* Page has changed */

        private const int PGHDR_NEED_SYNC = 0x004;
                          /* Fsync the rollback journal before
** writing this page to the database */

        private const int PGHDR_NEED_READ = 0x008; /* Content is unread */
        private const int PGHDR_REUSE_UNLIKELY = 0x010; /* A hint that reuse is Utility.Unlikely */
        private const int PGHDR_DONT_WRITE = 0x020; /* Do not write content to disk */

        /* Initialize and shutdown the page cache subsystem */
        //int sqlite3PcacheInitialize(void);
        //void sqlite3PcacheShutdown(void);

        /* Page cache buffer management:
    ** These routines implement ConfigOption.SQLITE_CONFIG_PAGECACHE.
    */
        //void sqlite3PCacheBufferSetup(void *, int sz, int n);

        /* Create a new pager cache.
    ** Under memory stress, invoke xStress to try to make pages clean.
    ** Only clean and unpinned pages can be reclaimed.
    */
        //void sqlite3PcacheOpen(
        //  int szPage,                    /* Size of every page */
        //  int szExtra,                   /* Extra space associated with each page */
        //  int bPurgeable,                /* True if pages are on backing store */
        //  int (*xStress)(void*, PgHdr*), /* Call to try to make pages clean */
        //  void pStress,                 /* Argument to xStress */
        //  PCache pToInit                /* Preallocated space for the PCache */
        //);

        /* Modify the page-size after the cache has been created. */
        //void sqlite3PcacheSetPageSize(PCache *, int);

        /* Return the size in bytes of a PCache object.  Used to preallocate
    ** storage space.
    */
        //int sqlite3PcacheSize(void);

        /* One release per successful fetch.  Page is pinned until released.
    ** Reference counted.
    */
        //int sqlite3PcacheFetch(PCache*, uint, int createFlag, PgHdr**);
        //void sqlite3PcacheRelease(PgHdr*);

        //void sqlite3PcacheDrop(PgHdr*);         /* Remove page from cache */
        //void sqlite3PcacheMakeDirty(PgHdr*);    /* Make sure page is marked dirty */
        //void sqlite3PcacheMakeClean(PgHdr*);    /* Mark a single page as clean */
        //void sqlite3PcacheCleanAll(PCache*);    /* Mark all dirty list pages as clean */

        /* Change a page number.  Used by incr-vacuum. */
        //void sqlite3PcacheMove(PgHdr*, uint);

        /* Remove all pages with pgno>x.  Reset the cache if x==0 */
        //void sqlite3PcacheTruncate(PCache*, uint x);

        /* Get a list of all dirty pages in the cache, sorted by page number */
        //PgHdr *sqlite3PcacheDirtyList(PCache*);

        /* Reset and close the cache object */
        //void sqlite3PcacheClose(PCache*);

        /* Clear flags from pages of the page cache */
        //void sqlite3PcacheClearSyncFlags(PCache *);

        /* Discard the contents of the cache */
        //void sqlite3PcacheClear(PCache*);

        /* Return the total number of outstanding page references */
        //int sqlite3PcacheRefCount(PCache*);

        /* Increment the reference count of an existing page */
        //void sqlite3PcacheRef(PgHdr*);

        //int sqlite3PcachePageRefcount(PgHdr*);


        /* Return the total number of pages stored in the cache */
        //int sqlite3PcachePagecount(PCache*);

#if SQLITE_CHECK_PAGES
/* Iterate through all dirty pages currently stored in the cache. This
** interface is only available if SQLITE_CHECK_PAGES is defined when the
** library is built.
*/

//void sqlite3PcacheIterateDirty(PCache pCache, void (*xIter)(PgHdr *));
#endif

        /* Set and get the suggested cache-size for the specified pager-cache.
**
** If no global maximum is configured, then the system attempts to limit
** the total number of pages cached by purgeable pager-caches to the sum
** of the suggested cache-sizes.
*/
        //void sqlite3PcacheSetCachesize(PCache *, int);
#if SQLITE_TEST
    //int sqlite3PcacheGetCachesize(PCache *);
#endif

#if SQLITE_ENABLE_MEMORY_MANAGEMENT
/* Try to return memory used by the pcache module to the main memory heap */
//int sqlite3PcacheReleaseMemory(int);
#endif

#if SQLITE_TEST
    //void sqlite3PcacheStats(int*,int*,int*,int*);
#endif

        //void sqlite3PCacheSetDefault(void);

#endif
        //* _PCACHE_H_ */
    }
}